
package com.bangcommunity.bbframe.sdm.web.filter;

import com.bangcommunity.bbframe.common.utils.lang.StringUtils;
import com.bangcommunity.bbframe.dynconfig.CommonDynConfig;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 跨域操作拦截器（在服务器返回信息后处理）
 * <p/>
 */
public class CrossFilter extends OncePerRequestFilter {

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {
        String crossOrigin = CommonDynConfig.getValue("crossOrigin", "*");
        String origin = request.getHeader("Origin");
        if (StringUtils.isNotBlank(origin) && StringUtils.isNotBlank(crossOrigin)) {
            if (crossOrigin.equals("*") || crossOrigin.indexOf(origin) != -1) {
                response.setHeader("Access-Control-Allow-Origin", origin);
            }
        }
        response.setHeader("Access-Control-Allow-Headers", "X-Requested-With,Content-Type");
        response.setHeader("Access-Control-Expose-Headers", "X-Requested-With");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Request-Method", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");

        // response.setHeader("Access-Control-Allow-Headers", "Content-Type");
        response.addHeader("Access-Control-Allow-Credentials", "true");
        filterChain.doFilter(request, response);
    }
}
